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sladkih [1.3K]
3 years ago
15

Simplify y^-2/y^-7. Write your answer with a positive exponent only.

Mathematics
2 answers:
Vaselesa [24]3 years ago
6 0

Answer:

y^2

Step-by-step explanation:

One way of doing this problem is to multiply both numerator and denominator by y^7.  Doing this we get:

  y^(-2+7)

--------------- = y^2

 y^(-7+7)

attashe74 [19]3 years ago
4 0

Answer:

y^5

Step-by-step explanation:

y^-2/y^-7

When we divide exponents with the same base, we subtract the exponents

y^ ( -2 - -7)

y^ ( -2+7)

y^ 5

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Find the value of x that makes m||n​
svet-max [94.6K]
7x-23+11x+23=180
4x+0=180
4x/4=180/4
X=45

Answer: x=45
5 0
3 years ago
70 points and i’ll give brainliest!! please answer all the questions on the page! must show work and how you got the answer. ple
Bezzdna [24]

6. One variable only so pretty straightforward.

length-x+4

width-x

x+x+4=80

2x=76

x=38

x+4=42

answer: length 42cm and width 38cm

7. Another money problem!

n-# of nickels

q-# of quarters

n=3+q

0.05n+0.25q=2.85

Substitution works like a charm!

0.05(3+q)+0.25q=2.85

0.15+0.05q+0.25q=2.85

0.3q=2.7

q=9

n=3+q

n=3+9

n=12

answer: 9 nickels and 12 quarters

8. One variable situation again.

Ann's money-2b+9

Betty's money-b

b+2b+9=60

3b=51

b=17

2b+9=43

answer: Ann has $43 and Betty has $17.

9. # of red m&m's-x+1

# of blue m&m's-x

x+1+x=13

x=6

x+1=7

answer: 6 blue and 7 red m&m's

10. a-number of adult tickets

s-number of student tickets

a+s=785 ----> a=785-s

5a+2s=3280

5(785-s)+2s=3280

-3s=-645

s=215

a+s=785

a+215=785

a=570

answer: 215 children tickets and 570 adult tickets

3 0
3 years ago
Find the surface area of a figure
My name is Ann [436]
Rectangular parallelepiped, right rectangular prism)
lwh

Prism
bh
8 0
3 years ago
Solve.<br><br><br> k<br> 5<br> + 9 = 22<br><br> k =
mihalych1998 [28]

Answer:

Step-by-step explanation:

Here you go mate

Step 1

-3x<3  Equation/Question

Step 2

-3x<3  Simplify

-3x<3

Step 3

-3x<3  Divide by -3

Answer

x>-1

3 0
3 years ago
Can someone pls help im new to this
Serggg [28]

Answer:

5

Step-by-step explanation:

\frac{-10}{-2} \\\\5

3 0
3 years ago
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